Golang 与 LDAP 通信

Question

我正在尝试使用 golang 将用户连接到 ldap 并对其进行身份验证。

我正在使用 go-ldap-client使用以下示例代码:

package main

import (
    "log"
    "github.com/jtblin/go-ldap-client"
)

func main() {
    client := &ldap.LDAPClient{
        Base:         "dc=example,dc=com",
        Host:         "ldap.example.com",
        Port:         389,
        UseSSL:       false,
        BindDN:       "uid=readonlysuer,ou=People,dc=example,dc=com",
        BindPassword: "readonlypassword",
        UserFilter:   "(uid=%s)",
        GroupFilter: "(memberUid=%s)",
        Attributes:   []string{"givenName", "sn", "mail", "uid"},
    }
    # It is the responsibility of the caller to close the connection
    defer client.Close()

    ok, user, err := client.Authenticate("username", "password")
    if err != nil {
        log.Fatalf("Error authenticating user %s: %+v", "username", err)
    }
    if !ok {
        log.Fatalf("Authenticating failed for user %s", "username")
    }
    log.Printf("User: %+v", user)

    groups, err := client.GetGroupsOfUser("username")
    if err != nil {
        log.Fatalf("Error getting groups for user %s: %+v", "username", err)
    }
    log.Printf("Groups: %+v", groups) 
}

已安装对 gopkg.in/ldap.v2 的依赖。

问题是我收到以下错误:

2016/01/15 17:34:55 Error authenticating user username: LDAP Result Code 2 "Protocol Error": ldap: cannot StartTLS (unsupported extended operation)
exit status 1

关于这个错误有什么提示吗？

Answer 1

好的，让我们尝试使用 github.com/go-ldap/ldap 进行身份验证。首先你需要创建一个*ldap.Conn。如果您的 LDAP 服务器支持，我建议使用 TLS:

// TLS, for testing purposes disable certificate verification, check https://golang.org/pkg/crypto/tls/#Config for further information.
tlsConfig := &tls.Config{InsecureSkipVerify: true}
l, err := ldap.DialTLS("tcp", "ldap.example.com:636", tlsConfig)

// No TLS, not recommended
l, err := ldap.Dial("tcp", "ldap.example.com:389")

现在您应该与 LDAP 服务器建立了事件连接。使用此连接，您必须执行绑定(bind):

err := l.Bind("user@test.com", "password")
if err != nil {
    // error in ldap bind
    log.Println(err)
}
// successful bind